Java基础-面向对象:Bank项目练习2

实验题目 2： 扩展银行项目，添加一个 Customer 类。 Customer 类将包含一个 Account对 象。

实验目的： 使用引用类型的成员变量。

提 示：

1. 在banking包下的创建Customer类。该类必须实现上面的UML图表中的模 型。

a. 声明三个私有对象属性：firstName、 lastName 和 account。

b. 声明一个公有构造器，这个构造器带有两个代表对象属性的参数（f 和 l）

c. 声明两个公有存取器来访问该对象属性，方法 getFirstName 和 getLastName

返 回相应的属性。

d. 声明 setAccount 方法来对 account 属性赋值。

e. 声明 getAccount 方法以获取 account 属性。

2. 在 exercise2 主目录里，编译运行这个 TestBanking 程序。应该看到如下 输出结果:

Creating the customer Jane Smith.

Creating her account with a 500.00 balance.

Withdraw 150.00

Deposit 22.50

Withdraw 47.62

Customer [Smith, Jane] has a balance of 324.88

package com.troubleshooting.bank1;

//定义一个账户
public class Account {
    // 账户余额
    private double balance;

    public Account(double init_balance) {
        balance = init_balance;
    }

    // 获取账户余额
    public double getBlance() {
        return balance;
    }

    public void setBalance(double balance) {
        this.balance = balance;
    }

    // 存钱
    // amt存钱的额度
    public void deposit(double amt) {
        balance += amt;
    }

    // 取钱
    // amt取钱的额度
    public void withdraw(double amt) {
        if (balance >= amt) {
            balance -= amt;
        } else {
            System.out.println("余额不足！");
        }
    }
}

package com.troubleshooting.bank2;
import com.troubleshooting.bank1.Account;
public class Customer {

    private String firstName;
    private String lastName;
    private Account account;

    public Customer(String f,String l){
        firstName = f;
        lastName = l;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public Account getAccount() {
        return account;
    }

    public void setAccount(Account account) {
        this.account = account;
    }

}

package com.troubleshooting.testbank1;
/*
 * This class creates the program to test the banking classes.
 * It creates a new Bank, sets the Customer (with an initial balance),
 * and performs a series of transactions with the Account object.
 */

import com.troubleshooting.bank1.Account;
import com.troubleshooting.bank2.Customer;

public class TestBanking2 {

  public static void main(String[] args) {
    Customer customer;
    Account  account;

    // Create an account that can has a 500.00 balance.
    account = new Account(500.00);
    System.out.println("Creating the customer Jane Smith.");
    //code
    customer = new Customer("Jane","Smith");
    System.out.println("Creating her account with a 500.00 balance.");
    //code
    //account.setBalance(500);
    customer.setAccount(account);
    System.out.println("Withdraw 150.00");

    //code
    //account.withdraw(150);
    customer.getAccount().withdraw(150);
    System.out.println("Deposit 22.50");
      //code
    //account.deposit(22.50);
    customer.getAccount().deposit(22.50);
    System.out.println("Withdraw 47.62");
       //code
    //account.withdraw(47.62);
    customer.getAccount().withdraw(47.62);
    // Print out the final account balance
    System.out.println("Customer [" + customer.getLastName()
         + ", " + customer.getFirstName()
         + "] has a balance of " + customer.getAccount().getBlance());
  }

private static void customer(String string, String string2) {
    // TODO Auto-generated method stub

}
}